Is distilled or deionized water required, rather than tap water?
What is the difference? Distilled or deionized water is recommended because it is more consistent than tap water. Impurities in tap water can change the working and set time of an investment. With distilled or deionized water, the impurities are minimized so the investment properties are more repeatable drum to drum and batch to batch. All of R&R’s retained batch samples are evaluated using deionized water to insure batch to batch consistency. At times, I would like to lengthen or shorten the set time of the material I am investing. Do you have any suggestions? In general, waremer water and/or warmer powder will speed up the setting time. Cold water and/or powder has the opposite effect. Does a flask really have to set undisturbed for an hour or two before removing the sprue base? I would like to speed up my production cycle and remove the base sooner than an hour. The investment does require at least an hour’s time to set completely. Many customers see finning and other defects associ
